html,body {
  margin: 0;
  padding: 0;
  font-size: .48rem;
  height: 100%;
  width: 100%;
}
#root {
  height: 100%;
}

.grid {
  &>div {
    width: 9rem;
    height: 3rem;
    display: flex;
    &>span {
      flex: 1;
      line-height: 3rem;
      border: 1px solid #ccc;
      text-align: center;
    }
  }
}

.c1 { color: red; }
.c2 { display: block; }
.c3 { display: none; }
